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- #include<bits/stdc++.h>
- using namespace std;
- long long fib(int n)
- {
- if(n==0 || n==1) return n;
- else return fib(n-1)+fib(n-2);
- }
- int main()
- {
- int n;
- scanf("%d", &n);
- printf("%lld", fib(n));
- return 0;
- }
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